package org.pms.filters;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class EncodingFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("中文乱码处理...");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        // 向下转换类型
        HttpServletRequest req = (HttpServletRequest)servletRequest ;
        HttpServletResponse resp = (HttpServletResponse)servletResponse ;

        // 设置编码
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");

        // 放行
        filterChain.doFilter(req,resp);
    }

    @Override
    public void destroy() {

    }
}
